Fuse for bombs and the like



FUSE FOR omas AND THE LIKE Filed Jan. 24. 1930 3 Sheets-Sheet 1 v I znvenfari" Nov. 17, 1931. L. PEREGO 1,832,579

FUSE FOR BOMBS AND THE LIKE Filed Jan. 24, 1930 s Sheeis-Sheet 2 o If a w Agi y fin Nov. 17, 1931. PEREGO 1,832,579

FUSE FOR aomss AND THE LIKE Filed Jan. 24, 1930 3 Sheets-Sheet 5 30 cut invention is supposed @atented New. l7, 1931 I PATENT; OFFICE LUIGI PEREG OF MILAN, ITALY FUSE FOB B03538 AND THE LIKE Application filed January 24,

The present invention relates to a fuse adapted to ensure the explosion as the result of percussion of any explosive device such as bombs, projectiles, torpedoes, explosive shells.

The fuse is characterized by arrangements which ensure the disassemblage of the percussion mechanism under the action of a shoe which may not have caused explosion, so a's to render impossible the explosion of the device under the action of any other shock or successive handling, so that the apparatus becomes completely harmless if it has not been exploded by the eifect of the first shock.

The improved fuse is-characterized essentially by having the two movable parts of its percussion exploding mechanism held apart g 0 which are sohd with the body of the bomb and means of a spring, these parts being mounted on two pieces which are respectively. engaged in their active 2o cesses formed in the b y of the explosive apparatus, one of the pieces and one of the recesses being shaped so as to ensure the (11S; engagement of the parts from the recesses under the action of any shock. The fuse is 2 further characterized by other supplementary structural, arrangements relating to mounting and safety devices which aredescribed in detail below.

The fuse forming the subject of the presin the following description to be applied to a bomb suitable for throwing by hand or by a bomb throwing device. It will be evident that it may be applied in an analogous way by varying only the subordinate arrangements, to any other suitable similar explosive.

The accompanying drawings illustrate by way of example and diagrammatically different ways of carrying the tice.

Figs. 1, 2 and 3 illustrate respectively two side views partly in section and a transverse view of one construction.

Fig. 4 is a longitudinal section of another construction.

Figs. 5 and 6 illustrate longitudinal and transverse views of a third construction.

Fig. 7 illustrates on a larger'scale a pr1ming arrangement in preferred construction.

Fig. 8 is a longitudinal section of a bomb 1930, Serial No. 423,142,

parts are kept apart by osition in two rep the plug is in position,

and in Italy November 16,1929.

for throwing to which is applied the arrange ment shown in Fig. 7

In the construction illustrated in Fi 1, '2 and 3, the body 1 of the bomb is c linf ical and in the neighborhood of its median plane is provided with a hollow 2 in which is placed the priming mechanism. The said mechanism consists as usual of the two parts 4 and i (see Figs. 1 and 4), which are termed the percussion masses. They are mounted on two conical pieces one of which carries the striker and t e other the priming. The sai a spring 5 which normally is in the position of rest, the conical backs of the two carrying pieces being in enagement with the two recesses or cups 6, 6'

have an elliptical form, their edges bem disposed in planes which are oblique with regard to the axes of the conical surfaces.

The part 4 is bored throughout its length by a hole allowing the spark to pass to the detonator and secondl to the explosive enclosed in the body of t e bomb.

Corresponding to the hollow 2 is a plug 7 of suitable shape to adapt it to complete and lie flush with the outer cylindrical surface of the bomb. To this lug is rigidly fixed a fork 8 which is adapte to introduce itself, when between the bodies 4 and 4:, to keep them safely apart until the moment when the bomb is discharged. Any convenient means may be used to allow the plug to be drawn close-against the body of the bomb (for example parts 10, 11 and 12 indicated in Fig. 4)

When the locking means are removed, so that when it is thrown and during its trajectory the plug 7 with its fork 8 leaves the body of the bomb, so that at the moment of striking an object the percussion operates to explode the bomb. If for any reason the explosion does not take place the bomb presents no danger because the priming mechanism has become disassembled into two parts which are quite independent and it can no lon er operate and the explosive device becomes armless. Supposing that the shock strikes with one of its and one of ends, the spring 5 is compressed bomb is to be thrown the said the bodies 4 or 4', whichever is up ermost disengages itself from its correspon ing cup 6 or 6'. Thanks to the inclination of the edge of the cup, the parts 4, 4 are freed by one of their extremities and turn upon themselves outwards and take up a position of equilibrium in which the axes of the conical pieces are perpendicular to the end planes of the cups. When the spring 5 expands the piece which has left its cup cannot re-enter it because of the new position taken by the pieces 4 and 4:. The device is disassembled and the parts fall from the bomb by an opening provided in one of its sides.

The operation described cannot take place if the bomb strikes the ground on its side and particularly on the right side in Fig. 1.

In order to ensure that even in this case the object of the invention shall be attained there are provided elastic leaves 9 for example of steel which embrace one part of the mechanism 4, 4. At the moment of percussion, assuming that the bomb strikes an object with the side in question, the springs 9 react so as to cause the partsa, and 4 to leave their corresponding cups.

The construction illustrated in Fig. 4 operates in a manner which is analogous to'that described above. It only differs from the latter in having the priming device disposed the end of the bomb instead of in the mid- In an analogous manner operates the construction illustrated in Figs. 5 and 6, but this differs from the first construction in that the explosion mechanism does not leave the body of the bomb but remains enclosed therein even after the bomb strikes, its parts being disassembled, however, in a chamber 13 provided in the apparatus.

In the preferred construction which is illustrated in Figs. 7 and 8 the priming device comprises two cylindrical parts 4, 4 she ed as cones and carrying respectively the stri er 1 and the priming 2. These parts are kept apart by a reaction spring 3 and their conical ends engage in two supports 6, 6 provided with hollows or recesses the edges of which are suitably shaped.

In order that the ends of the percussive masses may be induced to leave their positions supports 6, 6 which easily, at least one of the in the construction illustrated have the form of hollow cylindrical cups, in which the conical ends en age, the edges of the said supports are forme on a curved line with the feature that they have a constant inclination with regard to the axis of the cup. Such a shape comprises the arcs of a helix suitably joined. A suitable inclination is about 22. The axes of the cups may coincide as illustrated in Fig. 7 or they may be out of alignment with one another while remainin parallel. ease the extremities of t e cups have curva- :ures substantially parallel to one another 'portions having th In that be and inclined with regard to the axes of the cups 6, 6. The said the whole outer surface of t e cones of the percussive masses or they may only touch at some points. They may have the form of a parallelopiped or of a cylinder with a directrix which is not circular, and may be hollow or solid. In some particular cases it .is convenient to arrange these supports with their axes convergin and to form the edges of the assembly with iiferent curvatures, which will assure the bases 4, 4' leaving their supports only in a particular direction or even in opposite directions.

' The constructive details of the invention may be varied to meet practical requirements without departing from the spirit of the in vention.

What I claim is:

1. A fuse for projectiles and the like, comprising a pair of movable members having outwardly extending ends, supports for eng ement with said outwardly extending on s, and resilient means for normally urging said movable members into said supports, the engaging portions of said supports consisting of cylindrically-recessed portions havmg the engaging edges lying in a plane oblique to the axis of said recessed portions.

2. A fuse for projectiles and the hire, comprising a air of movable parts having proecting en s, supports for said movable parts and resilient means for normally urging sai movable parts into engagement with said supports, the engaging parts of said supports consisting of elliptically-recessed parts having the upper ed es lying in a plane oblique to the axis of sai elliptically-recessed parts.

3. A fuse for rojectiles and the like, comprising a air 0 movable parts, a pair of opposite isposed supports for said movable parts, and resilient means for normally urglng said'movable parts into engagement with said supports, the engaging ortions of said supports consisting of cylin rically-recessed e engaging edges lying in oblique planes to the axis of said recessed portions,.the inclination of said edges being opposite, whereby upon shock said movable members are released from said supports at those points on the edges of said supports which are most distant from one another.

{1. A fuse for projectiles and the like, comprising a pair of movable parts, a pair of o posltely-dlsposed supports for said mova le parts, and resilient means for normally urging said movable parts into engagement with said supports, the enga in portions of said supports consisting 0 el iptically-recessed portions having the engaging edges lying in oblique planes to the axis of said recessed portions, the inclination of said edges ing opposite, whereby upon shock said movable members are released from said sup ports at those points on the edges of said supcups ma be adjusted to llil members for passage through said opening upon shock.

6. In a projectile having an opening in its Wall, a fuse comprising a air of movable members, supports for sai movable mem- "ao bers, resilient means for normally urgin said movable members into engagement with said supports, the engaging portlons of said supports consisting of recessed parts having the outer edges of said parts lying in a plane oblique to the axis of the supports, and the most distant portions of sai edges =positioned adjacent said opening, and elastic reaction members disposed opposite said open ing to disassemble the parts upon lateral shocks adjacent said elastic reaction members,

7. A fuse for projectiles and the like, comprising a. pair of movable members, supports for said movable members, and resilient means for normally urging said movable members into engagement with said supports,

the engaging portions of said supports consistin of recessed portions, the outer edges of whlch are adapted to engage said movable members throughout the entire extent of said edges.

' 8. A fuse for projectiles and the like, comprising a pair of movable members, supports having surfaces for said movable members,

and resilient means for normally urging said movable members into engagement with said sup orting surfaces, the engaging portions of sai supporting surfaces consisting of recessed ortions having their outer edges shaped in the form of the arcs of a helix.

9. A fuse for projectiles and the like, com

prising a pair of movable members, supports for said movable members, and resilient means for normally urging said movable members into engagement with saidsupports,

" the engaging portions of said supports consisting of surfaces having their outer edges shaped so as to have at each portion thereof an inclination to the axis of the movable parts of substantially 22. In testimony whereof I efiix my signature.

LUIGF-f PEER-GU.

portions being opposite 

